EP3066724B1 - Push-pull plug connector having an additional locking element - Google Patents

Description

The invention relates to a plug for a connector according to the preamble of claim 1.

Such a plug for a connector comprises an inner assembly, a displaceably mounted relative to the inner assembly and the inner assembly at least partially enclosing the outer sleeve and first locking means for locking the plug with an associated connector part in a plugging of the plug on the connector part, wherein the lock can be solved by a displacement of the outer sleeve with respect to the inner assembly.

Such connectors, consisting of a plug and a connector part, are known under the name push-pull connector. This name is derived from the function of such connectors. So they can be closed by simply plugging the plug in a plug-in on the connector part ("push"). The connector part may be a socket or a second connector. In the plugging or by plugging locking means of the plug and the connector part are locked together, so that the connector is not by a train, e.g. can be solved on a cable connected to the plug. To release the connection, the outer sleeve of the plug is pulled against the insertion direction ("pull"). In this case, there is a relative movement between the outer sleeve and the inner assembly of the plug, whereby the locking means are unlocked. If the outer sleeve is pulled further counter to the insertion direction, the plug is released from the connector part.

Other types of connectors require an additional operation to lock or unlock. Such an operation would be, for example, raising or depressing a latching hook serving as a locking means or additional rotational movement of the outer sleeve, such as e.g. common in so-called bayonet connectors.

In contrast, push-pull connectors allow a locked connection of the two connector parts, ie the plug and the connector part, with easy-to-manufacture locking and comfortable unlocking. A connector of this type is for example from the DE 10 2007 031 504 A1 known.

However, such connectors have the disadvantage that, if necessary, an accidental release of the connector due to the simple unlocking process can be done by pulling on the outer sleeve. If, for example, a plurality of such connectors are arranged close to each other and only one of these connectors is to be solved, it can happen that accidentally also another, for example, adjacent connector is solved. Depending on the technical field in which the connector is used, inadvertent disconnection of a connector can lead to considerable problems.
Another disadvantage of the known connectors is that any person who has access to the connector can solve such a connector without further aids. Accidental, arbitrary or unauthorized loosening can not be prevented with the known push-pull type connectors. US 2009/029584 A1 discloses a connector according to the preamble of claim 1. The invention is based on the problem to provide a connector which has the functionality and thus the comfort of a push-pull connector, but if necessary in addition to an accidental, arbitrary and / or unauthorized Loosening is secured.
This problem is solved by a connector for a connector having the features of claim 1.
Thereafter, an additional locking member is provided which is slidably mounted and in at least one stable locking position in which the displacement of the outer sleeve is blocked with respect to the inner assembly, and at least one stable release position in which the displacement of the outer sleeve relative to the inner assembly released is, is bringable.
In the present case, a plug is generally understood to mean a plug-in element that can be attached to an associated plug connector part. A plug can generally have a male plug-in section to be inserted into a socket of the plug connector part, or a female, in particular socket-shaped plug-in receptacle for receiving a plug-in section of the plug connector part.
Such a connector can be connected to an associated connector part. The plug and the connector part together form a connector. With such a connector, for example, electrical or optical connections can be closed or disconnected. If the additional locking element is in a stable release position and is not actuated, ie displaced, corresponds to Function of the connector of that of a conventional push-pull connector. Thus, the plug can be connected to the connector part, wherein both parts lock together during connection. To unlock can be pulled on the outer sleeve, whereby the lock is unlocked. By further pulling on the plug, the connection is disconnected.
However, the additional locking means is in a stable locking position, so the outer sleeve can not be moved, so that no release of the first locking means can be effected.
The additional locking element preferably has exactly one stable release position and exactly one stable locking position. A stable position in this context means a position in which the locking element remains when it has been adjusted to this position. If the locking element, for example, adjusted in its release position, the locking element remains in the release position until it is made, for example, using a suitable tool from this release position out again.
A displacement of the outer sleeve with respect to the inner assembly can take place along a direction of displacement, which is directed parallel to a peel-off direction, in which the plug can be removed from the connector part from a plugged and unlocked state. The stripping direction may extend antiparallel to a plug-in direction, wherein the plug-in direction corresponds to the direction in which the plug and the connector part are connected.

According to the invention, the additional locking element can be displaceable along a displacement axis, which runs substantially perpendicular to the direction of displacement of the outer sleeve. However, the additional locking element is also displaceable along a direction parallel to the direction of displacement of the outer sleeve displacement axis. According to the invention, the displacement axis of the additional locking element is spaced from a central axis of the connector, wherein the central axis is parallel to the direction of displacement of the outer sleeve. The direction of the displacement axis is defined by the direction of displacement of the additional locking element. The Shifting axis can basically be placed anywhere in the additional locking element. The center axis of the plug can be defined by the direction of displacement of the outer sleeve or by the insertion or removal direction. The center axis may point, for example, through the geometric center of the plug.

Furthermore, the additional locking element may be formed or arranged on the plug that it (only) by means of an external tool is displaceable. Such an external tool may be, for example, a custom tool specifically designed for this type of connector. Such an external tool may also be a type of key that fits only a single or a certain number of connectors. However, it can also be provided that the additional locking element with a commercially available tool, such as a screwdriver, is displaceable or by other tools that can be used as tools for actuating the additional locking element.

The plug can be plugged according to a further development of the connector part when the additional locking element is in the at least one stable locking position or when the additional locking element is in the at least one stable release position. Thus, the plug can always be connected to the connector part, regardless of the position of the additional locking element.

Alternatively, it is conceivable and possible that the plug can only be connected to the connector part when the additional locking element is in its stable release position.

Furthermore, it can be provided that the plug, when it is plugged onto the connector part, with this by means of the first locking means is locked when the additional locking element is in the at least one stable locking position and even if the additional locking element in the at least one stable Release position is located. The locking of the plug with the connector part can thus be independent of the position of the additional locking element.

It can further be provided that the position of the additional locking element does not change in the at least one stable locking position or the at least one stable release position by the process of plugging onto the connector part. When the additional locking element in a stable release position is located, before the plug is connected to a connector part, it thus remains in this stable release position when the plug is connected to the connector part. The same applies to the stable locking position. It can therefore be adjusted before connecting the two connector parts, whether the connector should be in a locked by the additional locking element or unlocked state after connecting the connector parts.

On the other hand, it can also be provided that the additional locking element is always brought by the insertion of the plug on the connector part in a certain position, for example, a stable locking position. This ensures that a connected connector is always locked after the connection has been made.

The plug may include a display device that indicates whether the additional locking element is in a stable locking position or a stable release position. Such a display device may be formed by a portion of the additional locking element in conjunction with a viewing window formed on the plug. If the portion of the additional locking element is / is not in the viewing window, this may indicate that the plug is in a locked state / unlocked state. Alternatively, the display device may also be provided, for example, by means of different display colors, e.g. Red and green, indicate if the connector is in a locked condition.

The additional locking element can be guided on a guide on the inner module, which corresponds in cross section to a dovetail connection. That is, the additional locking element may be displaceable on such a dovetail guide along its displacement axis, but is not detachable from the guide.

The outer sleeve may include a blocking means fixedly disposed on the outer sleeve and correspondingly displaceable along its displacement with the outer sleeve, the displacement being blocked by the additional locking element when the additional locking element is in the at least one locking position is located and released when the additional locking element is in the at least one release position. Such a blocking means may be formed, for example, by a web, which itself extends along the direction of displacement of the outer sleeve, for example. In the locking position, the additional locking element protrudes into the displacement path of the blocking means, so that the blocking means can not be moved past the locking element. Accordingly, the outer sleeve is locked against displacement. By contrast, in the release position, the locking element does not protrude into the displacement path of the blocking means, so that the blocking means and thus the outer sleeve can be displaced unhindered by the locking element.

The invention further relates to a connector comprising a plug according to any of the embodiments described herein, or any one or more of the aspects described herein, as well as a connector part associated with the plug.

Fig. 1A

einen Stecker eines Steckverbinders in einer ersten Ansicht;

Fig. 1B

den Stecker aus Fig. 1A in einer zweiten Ansicht;

Fig. 2A

einen Ausschnitt einer rückwärtigen Ansicht des Steckers aus Fig. 1A, die ein zusätzliches Verriegelungselement des Steckers in einer stabilen Freigabeposition zeigt;

Fig. 2B

den Stecker aus Fig. 1A in der Ansicht aus Fig. 2B mit dem zusätzlichen Verriegelungselement in einer stabilen Verriegelungsposition;

Fig. 3A

einen Ausschnitt einer schrägen seitlichen Ansicht des Steckers aus Fig. 1A;

Fig. 3B

den in der Ebene E1 aufgeschnittenen Stecker aus Fig. 3A mit einem zusätzlichen Verriegelungselement des Steckers in einer stabilen Freigabeposition;

Fig. 3C

den Stecker aus Fig. 1A in der Ansicht aus Fig. 3B mit dem zusätzlichen Verriegelungselement des Steckers in einer stabilen Verriegelungsposition;

Fig. 4

den Stecker aus Fig. 1A mit einem angeschlossenen Kabel und einem externen Werkzeug;

Fig. 5A

den Stecker aus Fig. 1A ohne dessen äußere Hülse und mit einem abgenommenen zusätzlichen Verriegelungselement;

Fig. 5B

den Stecker gemäß Fig. 5A mit aufgesetztem zusätzlichem Verriegelungselement;

Fig. 6A

einen verbundenen Steckverbinder mit angeschlossenem Kabel;

Fig. 6B

den Steckverbinder aus Fig. 6A während des Abziehens des Steckers vom Steckverbinderteil;

Fig. 6C

den Steckverbinder aus Fig. 6A nach dem Abziehen des Steckers vom Steckverbinderteil;

Fig. 7A

den Steckverbinder aus Fig. 6A in einer seitlichen, teilweise aufgeschnittenen Ansicht; und

Fig. 7B

einen Ausschnitt aus Fig. 7A.

Further features and advantages of the invention will become apparent in the following description of exemplary embodiments with reference to the figures. Show it:

Fig. 1A

a plug of a connector in a first view;

Fig. 1B

the plug off Fig. 1A in a second view;

Fig. 2A

a section of a rear view of the plug Fig. 1A showing an additional locking element of the plug in a stable release position;

Fig. 2B

the plug off Fig. 1A in the view Fig. 2B with the additional locking element in a stable locking position;

Fig. 3A

a section of an oblique lateral view of the plug Fig. 1A ;

Fig. 3B

the cut in the plane E1 plug Fig. 3A with an additional locking element of the plug in a stable release position;

Fig. 3C

the plug off Fig. 1A in the view Fig. 3B with the additional locking element of the plug in a stable locking position;

Fig. 4

the plug off Fig. 1A with a connected cable and an external tool;

Fig. 5A

the plug off Fig. 1A without the outer sleeve and with a removed additional locking element;

Fig. 5B

according to the plug Fig. 5A with attached additional locking element;

Fig. 6A

a connected connector with attached cable;

Fig. 6B

the connector off Fig. 6A during the removal of the plug from the connector part;

Fig. 6C

the connector off Fig. 6A after removing the plug from the connector part;

Fig. 7A

the connector off Fig. 6A in a lateral, partially cutaway view; and

Fig. 7B

a section from Fig. 7A ,

Fig. 1A and 1B show a plug 2 of a connector. 1 Fig. 1A shows a perspective view of an outer sleeve 21 and a rear portion 201 of the plug 2, while Fig. 1B represents the plug 2 in a perspective view of the outer sleeve 21 and the plug portion 204 of the inner part 200. The outer sleeve 21 encloses the rear part 201 and an inner part 200, which together form an inner assembly 20. In Fig. 1A the back 201 and a male portion 204 of the inner 200 can be seen; provides an overview of the inner assembly 20 Fig. 5A ,

The plug-in portion 204 is the portion at which an electrical and / or optical connection to a corresponding connecting portion of a connector part 3 (see, for example Fig. 6A ) can be produced. For this purpose, the plug-in section 204 can have one or more contacts or contact surfaces.

The plug 2 comprises a cable receptacle 29 with a cable attachment 28 for receiving or for connecting and for fixing a cable 5. Further, in Fig. 1A a displacement direction z in which the outer sleeve 21 is displaceable with respect to the inner assembly 20, and a center axis 25 of the plug 2 which extends parallel to the displacement direction z and penetrates the connector 2 in the center.

The plug 2 has at its rear portion 201 an opening 203, behind which an additional locking element 23 is arranged. The function of the additional locking element 23 and also in Fig. 1A to be recognized display device 26 will be described in more detail in connection with the following figures.

The plug portion 204 has a cross-section transverse to a displacement direction z, along which the sleeve 21 is slidable to the inner assembly 20, a substantially rectangular shape. This form is only to be understood as an example. Thus, the plug and / or plug portion 204 could be cross-sectioned, e.g. also have a circular shape or an oval shape.

FIGS. 2A and 2B show a section of a rear view of the plug Fig. 1A , Here, a part of the rear part 201 and a part of the outer sleeve 21 is shown in each case. The inner assembly 20 has at its rear part 201 on an outer sleeve 21 facing edge, the opening 203, behind which the additional locking element 23 is arranged.

The additional locking member 23 is slidably disposed along a sliding axis 24 on the inner assembly 20 and can be brought into a stable release position and a stable locking position. Fig. 2A shows the additional locking element 23 in the stable release position in which the additional locking element 23 is pushed all the way to the left in the direction of the arrow. Fig. 2B In contrast, the additional locking element 23 in the stable locking position, in which the additional locking element 23 is moved to the right in the direction of the arrow drawn there. Between the stable release position and the stable locking position, the additional locking element 23 can be adjusted. For example, a spring or a similar biasing member may be provided which automatically displaces the additional locking element 23 into one of said stable positions when it is in an unstable intermediate position between the locking position and the release position. Depending on whether the additional locking element 23 is in the stable release position or the stable locking position, a displacement of the outer sleeve 21 with respect to the inner assembly 20 is released or locked.

The additional locking element 23 has an engagement 230, in which an external tool 4 can engage in order to actuate the additional locking element 23.

In FIGS. 2A and 2B Furthermore, a display device 26 of the plug 2 is shown. The display device 26 indicates the locking state of the plug 2. In the example shown, the display device 26 consists of a viewing window 260 in the form of a recess at an upper corner of the rear part 201. This viewing window 260 releases a view of an extension 231 of the additional locking element 23, provided that it is in the locking position (alternatively be provided that the extension 231 of the additional locking element 23 is then visible in the viewing window when the additional locking element 23 is in the stable release position).

By the display device 26, a user is informed whether the plug 2 is locked or not. Such a display device 26 can in principle also be formed by means other than a viewing window 260 and an extension 231 of the additional locking element 23, for example by two different colors, which are assigned to the stable locking position and the stable release position and of which the respective current state the plug 2 is displayed accordingly. Further, for example, an electrical lighting means, such as a light emitting diode, indicate a state of the plug 2.

On or on the outer sleeve 21 or any other externally visible component of the plug 2 may be attached an indication in which direction the additional locking member 23 must be moved to be brought into the stable release position and / or the stable locking position.

Fig. 3A shows a section of a perspective view of the plug 2 Fig. 1A , Here, in particular, the outer sleeve 21, the rear portion 201 of the inner assembly 20 and the cable attachment 29 can be seen. Furthermore, the additional locking element 23 is visible behind the opening 203. In Fig. 3A In addition, a sectional plane E1 is drawn.

Figs. 3B and 3C show the plug 2 off Fig. 1A viewed from obliquely above, looking out along the cutting plane E1 Fig. 3A sliced section. In particular, the additional locking element 23 can be seen in a plan view, wherein the additional locking element 23 in Fig. 3B in the stable release position located and in Fig. 3C in the stable locking position. Furthermore, the opening 203 in the rear portion 201 of the inner assembly 20 is visible.

When the plug 2 with an associated connector part 3 (see FIGS. 6A to 6C ), first locking means 22, 30 of the plug 2 and the connector part 3 are locked together. In order to remove the plug 2 from the connector part 3, ie, to be able to disconnect, these first locking means 22, 30 must be unlocked. In order to unlock the first locking means 22, 30 when locked together, the outer sleeve 21 may be displaced relative to the inner assembly 20 in the direction of displacement z. By this displacement, the first locking means 22, 30 are unlocked, as in connection with the Figs. 7A and 7B will be explained.

When the additional locking member 23 is in the stable release position, relative displacement of the outer sleeve 21 with respect to the inner assembly 20 is possible. On the other hand, when the additional locking element 23 is in the stable locking position, such displacement is blocked. This includes, as in Figs. 3B and 3C illustrated, the outer sleeve 21 is a blocking means, specifically a web 210. Is the additional locking element 23 in the release position according to Fig. 3B , is the web 210 along the direction of displacement z up to the extension 231 of the additional locking element 23 in the way, so that the web 210 can be moved in the direction of displacement z until it comes into contact with the extension 231. In contrast, the additional locking element 23 is located according to Fig. 3C in the locking position, so is the web 210 of the outer sleeve 21 in the direction z, the additional locking element 23 with a locking portion 233 in the way, so that the web 210 at a (attempted) displacement of the outer sleeve 21 in the direction z to the locking portion 233 strikes and can not be moved beyond the lock section 233 out. It remains for the web 210 and thus the outer sleeve 21 no displacement or only a negligibly small displacement, which is not sufficient to unlock the locked first locking means 22, 30.

In the example shown, the additional locking element 23 is in the stable release position when it is completely to the left or according to the view in Figs. 3B and 3C moved completely down. Conversely, the additional locking element 23 is in the stable locking position when it is completely to the right or as viewed in FIG Figs. 3B and 3C moved to the top.

The additional locking element 23 may also be arranged differently or at other locations of the plug 2. Also, the additional locking member 23 need not necessarily be disposed on the inner assembly 20 of the plug 2, as in the illustrated example, but may also be supported on the sleeve 21 to cooperate with suitable blocking means of the inner assembly 20.

Fig. 4 shows the plug 2 with a cable connected 5 and with an external tool 4. The additional locking element 23 is designed so that it is eg with an external tool 4, for example in the form of a screwdriver, displaced. The tip 41 of the external tool 4 is used to actuate, ie move, the additional locking element 23 into the (in Fig. 4 not visible) engagement 230 inserted. By displacing the tip 41 of the external tool 4, the additional locking element 23 can then be moved from the stable locking position to the stable release position or vice versa from the stable release position to the stable locking position.

In principle, another external tool 4 can be used for actuating the additional locking element 23, for example a commercially available object, such as a pin or a nail. However, it can also be provided that only a specially designed for this purpose external tool 4 can actuate the additional locking element 23.

The displacement of the additional locking element 23 can in principle also be achieved otherwise than by a displacement movement of an external tool 4, for example by a rotation of the external tool in the manner of a key.

FIGS. 5A and 5B show the plug 2 without the outer sleeve 21 in a separate representation of the additional locking element 23 (FIGS. Fig. 5A ) or arranged on the inner assembly 20 locking element 23 (FIG. Fig. 5B ). The additional locking element 23 is guided on a guide 202 which extends along the longitudinal axis 24 and is displaceable along the longitudinal axis 24 relative to the web-shaped guide 202.

The guide 202 is arranged on an inner part 200 of the inner assembly 20. From its base, ie the location where it is connected to the inner part 200 of the inner assembly 20, the guide widens with increasing distance to the inner part 200. The additional locking element 23 has one of the shape of the guide 202 corresponding recess 232, so that the additional locking element 23 during the assembly of the plug 2 on the guide 202 slide along the longitudinal axis 24 and is held in the assembled state form-fitting manner on the guide 202.

Figs. 5A and 5B further show a plurality of disposed on the inner part 200 of the inner assembly 20 first locking means 22, in this case spring arms 205, which are provided to lock with corresponding locking means 30 of a connector part 3. At the in Figs. 5A and 5B invisible underside of the inner part 200 of the plug 2 corresponding locking means 22 are provided.

As based on Figs. 5A and 5B can recognize the rear portion 201 and the inner part 200 may be two different components, which are attached, for example, clip end to each other. The rear part 201, the inner part 200 and other components of the inner assembly 20 may basically be separately assembled or attached parts or be made in one piece.

Based on FIGS. 6A to 6C will now be explained how a connected connector 1, ie a connector 2 connected to a connector part 2, can be solved.

It shows Fig. 6A a plug 2 with a cable connected thereto 5. The plug 2 is inserted into a connector part 3, in this example, a mounted in a wall 6 socket, and locked by means of the first locking means 22, 30. If the additional locking member 23 is in the stable locking position, the plug 2 can not be separated from the socket (the connector part 3) before the additional locking member 23 has not been brought into the stable release position.

When the additional locking element 23 is in the release position, the outer sleeve 21 can be moved in the direction of displacement z. In this case, at least one spring may be provided, the force of which counteracts the displacement direction z against a displacement of the outer sleeve 21 relative to the inner assembly 20 and must be overcome for moving the outer sleeve 21.

In Fig. 6B the connector 2 is shown in a state in which the outer sleeve 21 is displaced relative to the inner assembly 20 and thus to the rear portion 201 of the inner assembly 20 and, accordingly, the first locking means 22, 30 are unlocked.

The unlocked from the connector part 3 plug 2 can be deducted by a further train in the direction of z from the connector part 3. Fig. 6C shows the connector 1 after removing the plug 2 from the connector part. 3

If the plug 2 is now plugged back on the connector part 3 and connected to this, the plug 2 is plugged against the direction of displacement z on the connector part 3. In this case, automatically lock the first locking means 22, 30 with each other. The additional locking element 23 is when plugging in the stable release position, the plug 2 is not locked by plugging the connector part 3 by the additional locking element 23. The additional locking element 23, however, when plugging in the stable locking position, the plug 2 is placed when plugging on the connector part 3 directly into a locked by the additional locking element 23 and can only be withdrawn again when the additional locking element 23 again has been moved to the stable release position.

Fig. 7A shows the connector 1 off Fig. 6A in a side, partially sectioned view, which provides a view of the locking of the first locking means 22, 30 releases. The corresponding section Fig. 7A is in Fig. 7B shown enlarged.

Figs. 7A and 7B show the connector in a state in which the first locking means 22, 30 are locked together. The first locking means 22 of the plug 2 are formed by hook-shaped portions of the spring arms 205, which engage in the locked state behind an associated edge serving as the first locking means 30 of the connector part 3. The spring arms 205 each have a bevel 220 on their hook-shaped heads, onto which the first locking means 30 runs when the plug 2 is plugged onto the connector part 3, so that the spring arms 205 are (slightly) bent outward. Once the connector 2 is far enough attached to the connector part 3, the hook-shaped portions of the spring arms 205 engage behind the edges of the locking means 30 and thus lock with these.

For releasing a locked connection of the first locking means 22, 30 serve unlocking 27, which are arranged on the outer sleeve 21 and in the present example by the spring arms 205 associated webs with the slopes 220 of the spring arms 205 complementary inclinations are formed. The unlocking means 27 are brought by a displacement of the outer sleeve 21 in contact with the bevels 220 and run on the slopes 220 of the spring arms 205 such that they are pressed transversely to the direction z outward, so that the engagement of the hook-shaped first locking means 22 behind the edge of the locking means 30 and thus the locking of the first locking means 22, 30 is released and the plug 2 can be removed from the connector part 3.

The idea underlying the invention is not limited to the above-described embodiments, but can in principle be realized even in completely different types of embodiments.

LIST OF REFERENCE NUMBERS

1

Connectors

2

plug

20

inner assembly

200

inner part

201

rear part

202

guide

203

opening

204

plug-in section

205

spring arm

21

outer sleeve

210

web

22

first locking means

220

slope

23

additional locking element

230

intervention

231

extension

232

recess

233

blocking portion

24

displacement axis

25

central axis

26

display device

260

window

27

unlocking

28

cable Tie

29

cable storage

3

connector part

30

first locking means

4

external tool

41

top

5

electric wire

6

wall

z

displacement direction

Claims (8)

1. Plug for a plug-in connector (1), comprising:

   - an inner assembly (20),

   - an outer sleeve (21) which is mounted such that it can be displaced in relation to the inner assembly (20) and at least partially surrounds the inner assembly (20), wherein the outer sleeve (21) can be displaced in relation to the inner assembly (20) along a displacement direction (z) which is parallel to a withdrawal direction in which the plug (2) can be withdrawn from the plug-in connector part (3) from a plug-connected and unlocked state,

   - first locking means (22, 30) for locking the plug (2) with an associated plug-in connector part (3) when the plug (2) is plug-connected to the plug-in connector part (3), wherein the locking arrangement can be released by displacing the outer sleeve (21) in relation to the inner assembly (20), and

   - an additional locking element (23) which is displaceably mounted and can be moved to at least one stable locked position, in which the displacement of the outer sleeve (21) in relation to the inner assembly (20) is blocked, and at least one stable released position, in which the displacement of the outer sleeve (21) in relation to the inner assembly (20) is enabled, wherein the additional locking element (23) can be displaced along a displacement axis (24) which runs substantially perpendicular to the displacement direction (z) of the outer sleeve (21),

   characterized in that the displacement axis (24) of the additional locking element (23) is at a distance from a centre axis (25) of the plug (2), wherein the centre axis (25) runs parallel to the displacement direction (z) of the outer sleeve (21).
2. Plug according to Claim 1, characterized in that the additional locking element (23) can be displaced only by means of an external tool (4).
3. Plug according to either of the preceding claims, characterized in that the plug (2) can be plug-connected to the plug-in connector part (3) when the additional locking element (23) is in the at least one stable locked position and when the additional locking element (23) is in the at least one stable released position.
4. Plug according to Claim 3, characterized in that the position of the additional locking element (23) in the at least one stable locked position or the at least one stable released position does not change as a result of the process of being plug-connected to the plug-in connector part (3).
5. Plug according to one of the preceding claims, characterized by an indicator apparatus (26) which indicates whether the additional locking element (23) is in a stable locked position or a stable released position.
6. Plug according to one of the preceding claims, characterized in that the additional locking element (23) is guided on a guide (202) on the inner assembly (20) which corresponds in cross section to a dovetail connection.
7. Plug according to one of the preceding claims, characterized in that the outer sleeve (21) comprises a blocking means, in particular a web (210), which can be displaced along a displacement path together with the outer sleeve (21), wherein the displacement path is blocked by the additional locking element (23) when the additional locking element (23) is in the at least one locked position and is released when the additional locking element (23) is in the at least one released position.
8. Plug-in connector comprising a plug (2) according to one of the preceding claims and an associated plug-in connector part (3).

Images